Bug 1523562 [wpt PR 15128] - Update interfaces/orientation-sensor.idl, a=testonly

Automatic update from web-platform-tests
Update interfaces/orientation-sensor.idl (#15128)

Source: https://github.com/tidoust/reffy-reports/blob/2cf7db1/whatwg/idl/orientation-sensor.idl
Build: https://travis-ci.org/tidoust/reffy-reports/builds/485766725
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wpt-commits: 1acbffcef578402832b73576ce957fb75e45cc9a
wpt-pr: 15128

testing/web-platform/tests/interfaces/orientation-sensor.idl

@@ -24,3 +24,10 @@ interface AbsoluteOrientationSensor : OrientationSensor {
 [Constructor(optional OrientationSensorOptions sensorOptions), SecureContext, Exposed=Window]
 interface RelativeOrientationSensor : OrientationSensor {
 };
+
+dictionary AbsoluteOrientationReadingValues {
+  required FrozenArray<double>? quaternion;
+};
+
+dictionary RelativeOrientationReadingValues : AbsoluteOrientationReadingValues {
+};